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  2. Date and time notation in the United States - Wikipedia

    en.wikipedia.org/wiki/Date_and_time_notation_in...

    Weeks are generally referred to by the date of some day within that week (e.g., "the week of May 25"), rather than by a week number. Many holidays and observances are identified relative to the day of the week on which they are fixed, either from the beginning of the month (first, second, etc.) or end (last, and far more rarely penultimate and ...

  3. Timestamp - Wikipedia

    en.wikipedia.org/wiki/Timestamp

    1985-102 T 10:15 UTC — year 1985, day number 102, i.e., 1985 April 12; 1985-W15-5 T 10:15 UTC — year 1985, week number 15, weekday 5 = 1985 April 12; 20180203073000 — used in Wayback Machine memento URLs, equals 3 February 2018 07:30:00; Examples of datestamps: 2025-05-25 — ISO 8601 international representation of 2025 May 25; Examples ...

  4. ISO 8601 - Wikipedia

    en.wikipedia.org/wiki/ISO_8601

    There is no limit on the number of decimal places for the decimal fraction. However, the number of decimal places needs to be agreed to by the communicating parties. For example, in Microsoft SQL Server, the precision of a decimal fraction is 3 for a DATETIME, i.e., "yyyy-mm-ddThh:mm:ss[.mmm]". [29]

  5. SQL - Wikipedia

    en.wikipedia.org/wiki/SQL

    SQL was initially developed at IBM by Donald D. Chamberlin and Raymond F. Boyce after learning about the relational model from Edgar F. Codd [12] in the early 1970s. [13] This version, initially called SEQUEL (Structured English Query Language), was designed to manipulate and retrieve data stored in IBM's original quasirelational database management system, System R, which a group at IBM San ...

  6. List of date formats by country - Wikipedia

    en.wikipedia.org/wiki/List_of_date_formats_by...

    Short format: dd/mm/yyyy (Day first, month number and year in left-to-right writing direction) in Afar, French and Somali ("d/m/yy" is a common alternative). Gregorian dates follow the same rules but tend to be written in the yyyy/m/d format (Day first, month number, and year in right-to-left writing direction) in Arabic language.

  7. Wikipedia:Current date and time - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:Current_date_and...

    Today is Monday, January 20, 2025. The time is 23:17 (UTC). This page was last edited on 8 October 2024, at 01:48 (UTC). Text is available under the Creative Commons ...

  8. Unix time - Wikipedia

    en.wikipedia.org/wiki/Unix_time

    Unix time numbers are repeated in the second immediately following a positive leap second. The Unix time number 1 483 228 800 is thus ambiguous: it can refer either to start of the leap second (2016-12-31 23:59:60) or the end of it, one second later (2017-01-01 00:00:00). In the theoretical case when a negative leap second occurs, no ambiguity ...

  9. Date and time notation in New Zealand - Wikipedia

    en.wikipedia.org/wiki/Date_and_time_notation_in...

    Date and time notation in New Zealand [refresh] Full date 24 January 2025 All-numeric date 2025-01-24 24/01/2025 Time 19:25 7:25 pm Date and time notation in New Zealand most commonly records the date using the day-month-year format (24 January 2025), while the ISO 8601 format (2025-01-24) is increasingly used for all-numeric dates, such as date of birth. The time can be written using either ...